Dataset: Inverse responses of species richness and niche specialization to human development

Humans impact biodiversity by altering land use and introducing nonnative species. Yet the extent to which coexistence processes, such as competition and niche shifts, mediate these relationships is not clear. This dataset was used in a study that aims to compare how human development influences wetland plant diversity by examining patterns of species richness, niche specialization, and nonnative species occurrences along a human development gradient. This dataset can be used to analyzed species richness and niche specialization (a measure of the range of human development extents over which a species occurs) patterns from species occurrence data across 1582 wetlands in Alberta, Canada. Associations between human development extent and species richness, niche specialization, and nonnative species can be tested using linear mixed models. Also, nonmetric multidimensional scaling ordination can be applied from raw data (see usage notes) to examine whether community composition differed ...人类通过改变土地利用方式及引入外来物种，对生物多样性造成影响。然而，诸如竞争与生态位偏移（niche shifts）这类物种共存过程，在多大程度上调节此类关联，目前尚不明确。 本数据集用于一项研究，该研究旨在通过沿人类开发梯度探究物种丰富度（species richness）、生态位特化度（niche specialization）以及外来物种（nonnative species）出现模式，对比人类开发活动对湿地植物多样性的影响。本数据集可用于分析加拿大阿尔伯塔省1582处湿地的物种出现数据中的物种丰富度与生态位特化度模式，其中生态位特化度指某一物种存续所覆盖的人类开发范围的量化指标。研究人员可通过线性混合模型（linear mixed models）检验人类开发程度与物种丰富度、生态位特化度及外来物种之间的关联。此外，还可基于原始数据（详见使用说明）采用非度量多维标度排序（nonmetric multidimensional scaling ordination），探究群落组成是否存在差异……